Good point. I bought a craigslist bike in July from a bike flipper. He had a three-car garage and two of them were filled with bikes. Two other craigslist customers came by while I was there. My car, with a bike rack to mount on the trunk, was parked in front of his house. I said I was going to take a long test ride and he waved me off with a smile and said something like "stay out as long as you want." I just don't see that happening in a more urban setting where people are meeting at a bike rack to make a deal. It never occurred to me that a stolen bike might be part of that equation.

That reminds me of something I read around here a while back about bike thieves locking stolen bikes to public racks while trying to selling them so they wouldn't be legally "in possession" of stolen items...as in, having the bikes in their garage, back yard, apartment, or wherever.